A polarization encoded photon-to-spin interface

We propose an integrated photonics device for mapping qubits encoded in the polarization of a photon onto the spin state of a solid-state defect coupled to a photonic crystal cavity: a polarization-encoded photon-to-spin interface (PEPSI). We perform a theoretical analysis of the state fidelity's dependence on the device's polarization extinction ratio and atom-cavity cooperativity. Furthermore, we explore the rate-fidelity trade-off through analytical and numerical models. In simulation, we show that our design enables efficient, high fidelity photon-to-spin mapping.

Automated summary

The proposed integrated photonics device efficiently maps qubits encoded in photon polarization onto the spin state of a solid-state defect. The device's fidelity depends on factors such as polarization extinction ratio and atom-cavity cooperativity, and a trade-off between rate and fidelity is explored through analytical and numerical models. Simulation results demonstrate high fidelity photon-to-spin mapping with the designed device.